The NBC series 'Constantine' is going to halt production after 13 episodes, but that doesn't mean it's the end for the NBC series. Based on the DC comic,NBC has gathered little information on ratings, due to the fact that it premiered in late October (it follows Grimm on Friday nights).

The good news is that Constantine has seen ratings jumps via DVR viewings (+81% for Episode 4) which could help NBC with a decision to start production on a second season.